Lennox International Inc MPB35ST-NM Introduction, General Information, Gas Pressure, Models, Fuel

CONGRATULATIONS!

In selecting this LENNOX B-Vent Gas Appliance you have chosen the finest and most dependable fireplace to be found anywhere. Its a beautiful, prestigious alternative to a wood burning fireplace. Welcome to a Family of tens of thousands of satisfied LENNOX Fireplace Owners.

Please carefully read and follow all of the instructions found in this manual. Please pay special attention to the safety instructions provided in this manual. The Homeowner's Care and Operation Instructions included here will assure that you have many years of dependable and enjoyable service from your LENNOX product.

Input (BTU) Manually-Modulated Gas Valves (millivolt models)

Models	Fuel	Input Rate
	Type	(BTU / HR)
MPB35ST-NM	Nat. Gas	30,000 high
		23,000 low
MPB35ST-PM	Propane	28,000 high
		22,000 low

Table 1

Electronic Models -

TABLE OF CONTENTS
Introduction	page	2
General Information	page	2
Gas Controls/Control Compartment,
Access	page	4
Operation/Care of Your Appliance	page	4
Variable Flame Adjustment	page	5
Venting Action and (spill switch)	page	5
Outside Combustion Air Control	page	6
Maintenance	page	6
Front Glass Enclosure Panel,
Removal and Installation	page	7
Logs, Vermiculite & Ember Placement	page	8
Burner Adjustments	page 10
Maintenance Schedule	page 11
Troubleshooting Guide – Millivolt	page 12
Troubleshooting Guide – Electronic ...	page 12
Millivolt Appliance Checkout	page 14
Electronic Appliance Checkout	page 14
Wiring Diagrams	page 14
Warranty	page 14
Product Reference Information	page 14
Accessory Components	page 15
Lighting Instructions – Millivolt	page 18
Lighting Instructions – Electronic	page 19
Replacement Parts List	page 20

INTRODUCTION

The millivolt appliances have a millivolt gas control valve witha piezo ignition system which provides safe, efficient operation.

The electronic appliances have an electronic intermittent pilot system provides safe, efficient operation. External electrical power is required to operate these units.

LISTING AS FOLLOWS:

These appliances comply with National Safety Standards and are tested and listed by Omni- Test Laboratories (Report No. 116-F-27-5) to ANSI Z21.50 - 2000 (in Canada, CSA 2.22

-2000), and CAN/CGA-2.17-M91 in both USA and Canada, as vented gas fireplaces.

Installation must conform to local codes. In the absence of local codes, installation must comply with the current National Fuel Gas Code, ANSI Z223.1 (NFPA 54). (In Canada, the current CAN/CGA B149 installation code.) Electrical wiring must comply with local codes. In the absence of local codes, installation must be in accordance with the National Electrical Code, NFPA 70 - (latest edition). (In Canada, the current CSA C22.1 Canadian Electric Code.)

GENERAL INFORMATION

Note: Installation and repair should be per- formed by a qualified service person. The appliance should be inspected annually by a qualified professional service technician. More frequent inspections and cleanings may be required due to excessive lint from carpeting, bedding material, etc.

IMPORTANT

It is imperative that the control compartment, burners and circulating air passage ways of the appliance be kept clean. See Maintenance instructions on Pagex 6.

Provide adequate clearances around air open- ings and adequate accessibility clearance for service and proper operation. Never obstruct the front openings of the appliance.

Due to high temperatures the appliance should be located out of traffic and away from furniture and draperies. Locate furniture and window coverings accordingly.

These appliances are designed to operate on natural or propane gas only. The use of other fuels or combination of fuels will degrade the performance of this system and may be dangerous.

Millivolt Models - BTU Input

Millivolt models come standard with the manu- ally-modulated gas valve; flame appearance and heat output can be controlled at the gas valve. Input of for these models is shown in the fol- lowing table:

Electronic models have a fixed rate gas valve. Input of electronic models is shown in the following table:

Input (BTU) - Fixed Rate

(electronic models)

Models	Fuel	Input Rate
	Type	(BTU / HR)
MPB35ST-NE	Nat. Gas	30,000
MPB35ST-PE	Pro. Gas	28,000
(if field converted)

Table 2

Gas Pressure -

Tables 3, 4 and 5 show the appliances' gas pressure requirements.

Inlet Gas Supply Pressure

(all models)

Fuel #			Minimum	Maximum
Natural Gas			5.0" WC	10.5" WC
			(1.24 kPa)	(2.61 kPa)
Propane			11.0" WC	13.0" WC
			(2.74 kPa)	(3.23 kPa)
Table 3
Manifold Gas Supply Pressure
		(millivolt models)
Fuel #			Low	High
Natural	(Lo) 2.2" WC			(Hi) 3.5" WC
Gas			(.55 kPa)	(.87 kPa)
Propane	(Lo) 6.3" WC			(Hi) 10.0" WC
		(1.57 kPa)		(2.49 kPa)
Table 4
Manifold Gas Supply Pressure
	(electronic models)
Fuel #				Fixed
Natural Gas				3.5" WC
				(.87 kPa)
Propane				10.0" WC
				(2.49 kPa)
Table 5

2

NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.